Amazon has the 30-Count Energy and Hydrate Singles To Go Drink Mix (Variety Pack) on sale for $8.47 with free shipping on $35+ or with Prime (extra 5% off with 5+ S&S orders). Zero sugar, 80mg caffeine.

• Flavors include Black Cherry Pomegranate, Orange Passion Fruit, Strawberry Watermelon and Concord Grape.